South African Warrant Officer insignia

[Tinto]

Hi South African members,
Here are badges some of which I believe were worn by Warrant Officers.
All are lugged except for the chromed badge which has long screw posts.
Were these worn on the hat or sleeve?
I seem to remember from a previous thread that the small collar badge was worn by Railway and Harbour Rifles in WW1.
Comments welcome.
John

[Arthur R]

These metal WO rank badges were worn on the sleeve, specifically the forearm. The chromed badges were introduced in the early 1970s.

[Alex Rice]

I have never seen a WO's badge with screw posts, they usually had clutch pin fittings. Makes no sense to have a long screw post on a cuff badge. The screw post badges in my experience were only for cap or beret badges.
Cheers,
Alex

[Tinto]

Thank you both, for your helpful comments.
Regards,
John